Method for obtaining respiratory gas at steady-state breathing
AssigneeMediPines Corporation
InventorSteve Lee
Life of this patent
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Abstract
The present invention provides a method for obtaining respiratory gas in steady state breathing with minimum contamination of atmospheric air. The breathed air is obtained using a breathing tube having two openings, a breathing opening with an oval shape and an atmospheric opening with a circular shape. The breathed air is passed through a breathing passageway between two openings with laminar flow, and further passed through a sampling hole disposed on the atmospheric opening and coupled to a sampling tube extended halfway into the breathing passageway through the sampling hole.
Claims10
A method of sampling steady state breathing air of a person, comprising:
- providing a breathing tube having an oval breathing opening, a circular atmospheric opening, and a breathing passageway between the breathing and atmospheric openings, wherein the breathing passageway is tapered from the breathing opening to the atmospheric opening,
- positioning the person's mouth about the oval breathing opening, and having the person breathe in and out through the breathing tube in a steady state manner, such that breaths of the person pass with laminar flow through the breathing passageway;
- and
- using a sampling tube coupling an opening disposed within the breathing passageway to sample air from a breath passing through the breathing passageway.
Dependencies are inferred from the claim text.